Demountable rim



E. G. BLUE.

DEMOUNTABLE RIM. vAPPLICATION r|LED1uNE14,=192o.

Smell/ivy Edward/65552@ 2 SHEETS-SHEET l.

Patented Oct. 4, 1921.

E. G. BLUE.

DEMOUNTABLE RIM.

APPLICATION F|LED1uNE14,192o.

1,392,292. 'Patented oct. 4, 1921.

2 SHEETS--SHEET 2.

S14/umwelt, 21g/Mara] @251g J E I UNITED STATES PATENT QFFjICE.

EDWARD G. BLUE, OF GRAPE CREEK, ILLINOIS.

DEMOUNTABLE RIM.

Application filed .Tune 14,

Be it known that I, EDWARD G. BLUE, a citizen of the United States ofAmerica, reV siding at Grape Creek, in the county of Verniilion andState of Illinois, have invented certain new and useful Improvements inDemountable Rims, of which the following is a specification. j

My present invention relatesV generally to demountable rims forautomobile and other wheels, my `object being the provision of a twopart rim construction capable of ready assembly and disassembly so as topermit of easy, quick tire change, and a further object is the provisionof a strong, durable construction which in its position on a wheelfellywill be positively held against accidental displacement of itsparts.

In the accompanying drawing which illustrates my invention and forms apart of this specification,

Figure 1 is a side view of my improved rim with a tire thereon, v

Fig. 2 is a plan view looking at the inner periphery of a fragmentaryportion of the rim adjacent to one "of the rim holding catches,

Fig. 3 is a cross section taken on line 33 of Fig. 2,

Fig. 4 is a cross section through the rim at a point between catches,

Fig. 5 is a cross section through the rim adjacent to the valve tube ofthe tire,

Fig. 6 is a plan view of the inner face of a fragmentary portion of oneof the rim sections adjacent to the tire valve tube, and

Fig. 7 is a similar view of the adjacent portion o-f the other rimsection.

Fig. 8 is a perspective view of a portion of the rim showing the twosections in detached relation.

Referring now to these figures my invention proposes a tire holding rim10 of demountable nature which as seen in Figs. 3, 4 and 5 includes apair of circular lat erally engageable and disengageable sections 11 and12, each having a tire bead engaging flange 18 around its outer edge.These sections are provided with oppositely beveled inner overlappingportions 14 and 15, and each has its inner edge terminating in a flatsurface abutting an annular shoulder 17 of the other section.

This construction and arrangement provides for an inner flat peripheryfor the entire rim formed for the major part by Specification of LettersPatent.

Patented Oct. 4, 1921.

1920. serial No. 388,997.

the inner flat face of the section 12, the two sections being held with`their inner edges 16 and shoulders 17 in laterally abutting relation inthe operative position by mc-ansof fiat spring catches 18 disposedtransversely of the inner periphery of the rim at circumferentiallyspaced points, one end of each of which catches is securely fastened asby means of a rivet or screw 19 to the inner' face of the section 12,and the opposite end having an outwardly projecting stud 2O for movementinto a radial opening 21 conformably placed in the seetion 11. lIhisstud carrying end of the spring catch 18 is free to flex inwardly whenthe rim is removed from a wheel fell as will be seen by comparison ofthe full and dotted lines of Fig. 3, to permit of withdrawal of the stud2O from the receiving aperture 21 of the section 11, and it will benoted from Fig. 2 that at a point opposite each spring catch 18 of thesection 12, the shouldered inner face of the section 11 is grooved as at22, the groove extending through its shoulder 17 vand of a width adaptedto snugly receive the free end of the spring catch 18 in interittingrelation. The side walls of each of the grooves 22 moreover merge intothe shoulder 17 by means of cin-ved surfaces as seen in Fig. 2 so as toefectively guide the free ends of the spring catches 18 into properposition when the rim sections are shifted laterally with respect to oneanother into assembled relation.

At one point the rim section 11 has a circumferentially slotted opening23 between its side edges and at a point opposite this opening thesection 12 has a similar slotted opening 24 intermediate its side edges,adapted to register with the slot 23 and communicating with its inneredge by means of a transverse slot 25 so as tothus provide for thereception of a tire valve tube 26 of a tire 27 the latter of which hasbeen previously introduced through the opening 23 of section 11.

Thus in operation upon removal of a rim constructed as above, from awheel felly it is simply necessary to flex the spring catches inwardlyfor the purpose of withdrawing their latching studs 2O from theapertures 21 of the section 11, in order to permit of relative lateralmovement of the two sections away from one another, to effect theirdisassembly, upon which the tire 27, remaining with the section 11 byvirture of the eX- tension of its valve tube through the slottedopening' 23, may be readily removed. In reassembly the tire is firstplaced on the section 11 with its valve tube extending through theslotted opening 23 and the section 12 is then shifted laterally intoengagement with the section 11,` with its spring caps 18 in alinementwith the inner transverse grooves 22 of the section 11 so that the freeends of the spring caps will be effectively guided into proper positionfor their studs 20 to spring into the apertures 21.

It is thus obvious my invention provides a two part demountable rim, theparts of which automatically lock as they are shifted together inoperative relation, and the locking means of which are notvonlyeffectively guided into operative position but are so disposed as tobevpositively locked against accidental displacement when the rim is ona. wheel felly.

I claim:

, A demountable rim comprising a pair of cylindrical sections havinginner oppositely beveled overlapping portions terminating in ilat edges,said sections having annular shoulders receiving the l'lat edges of thebeveled inner portions laterally abutting relation in the operativeposition and being also provided with iianged outer edges and withslotted valve tubereceiving openings, one of said sections havingcircumferentiallly spaced transversely extending spring catch piecessecured at one end thereto and provided with outwardly projectinglocking studsat their free ends, and the other of said sections beingprovided with apertures to receive the studs and also provided upon itsinner face with transverse grooves into which the inner ends of theapertures open, said grooves extending through the annular shoulder ofsaid section and having the side walls thereof nierging into theshoulder along curved lines to form guides forthe free ends of the saidspring catches when the two sections are shifted laterally intoer'lectively abutting relation.

In testimony whereof I have allixed my signature.

EDWARD G. BLU

